Assianoe to the amepjcan oom



- To all when; it may concern:

- marine-telegraph cable fs p n 45h Moshe GtFABMER, 0FsAlgis-imzrasseonusmtrs,asslonon ciao-Tun AMERICAN 00M- room) IELEGRABlI-WIRE COMPAN- F YORK CITY.

Lam-s Pam No. 97,374, dated mats-so, 1869.

Bejit knownthat I, Moses G. EARLIER, of Salem,

' in the. county of Essex, and State of Massachusetts, injtheform ofaribbon, upon the strengtheuingewires,

L which-will 8li8l il ke aud'nse tlie" refe hoe bein diawim gaihmiiupart Similar letters of tel Terence The ob ect of this improvementconstruction thanthose atpresentu sed,

In constructing the ordinary submarine-telegraph .7 cables, it is commonto the conducting-wires,

which are-usually made; of copper, and of sm'alldiamj --eter,' inthecentm of the'insulatiug-substance, around which a seiies of strongiron wires is woven .01 secured,

. for the purpose of giving the necessary strength to the cable, Thestrengthening-wires are then covered with tamed jam, or other soitcovering, and oyer this, in some cases, an additional coveringof strongwires,

known'as. armor-wires, is'applie'd. In this method of.

-constm'uction',-'the strengthening wires,- byireason of their numberand necessarily lai'ge size, pla'ced, as

they are, upon the exterior of the insulating-substance,

add great bulk to th'emnle, and render its munfacture aud manipulationnot only expensive, but diificult.

The nature. of my invention consists incoinbihing astrengthening-wire'or wires with the central electrical conductor orconch'lctors',v thus' dispensing with-the use of strengthening-wiresupon the enteriorf-of l" j insulating-substance; j

I provide one or more small steel'wiresof te na'city, B, of which ,I'cover with a ribbon on sheet of thin copper, O, laid spirally; or in any'other'ngan ner, upo pound w! The 00 e strengthening-nirea-th'us formingcom-'- fcnnsthe necessary electrical conductor.

armor-wires may be added.

ple,'the usual copper wires may be twisted in with of the Atlanticcable.

=. g g .orderspec There are various methods by which myinvention may bepractically carried out',.b ut the method which Iat present preferis'asfoll'ows: I

the usual jute covering; and, if desired, the usual Theconducting-material;instead of being applied, 5

may, if desired, be otherwise aimnged; as, forexamtlie'strngtheniug+wires, and-the-whole then covered withthe'insulatingsubstance; A j Various other arrangements of theconducting metals may be employed without departing fi'om my invention.1

Bythe, use of my improvement, I produce a submarine-telegraph cablehaving the gratest'atb inable.

strength and conductivity, with the least weight and smallest bulk. p

I'fiud, by actual experiment-and calculation, that a ble made on myplan, having superior relative trengt-h, and equal conductivity tothepresent deep- :Atlan-tic 'cable, occupies only one 'third of the-bulkThe-extmordinary strength and lightness of myiu i proved cable greatlyfacilitate its manipulation, and the operation of deep-sea laying willbe attended with I'.do not limit or confine myself to thenseof anyspecific number of wires or. metals, n'or totheprecise methodsofinanufacture herein described. p

. Having thus-described my invention,

, I claim as new, ml .desire .to secure by Lctteis Patehtl 1. As anarticle of manufactiue, an improved subi-marine-tclegiaph cable,consisting of a strengthening; core, conducimyahd insulator, surroundedbya jute '0r' hempen .buoy, arranged,one upon the other, in the 2. Themethod of consti-ucting-submarine-telegraph cables, by winding spirallyabout a tenacious steel strengthening-core, a i-i'ohon ofcopper, .toform the electrical conducton and by snrronnding the compound metallicwire thus formed'with any suitable insulator,

.and this with some buoyant material, all in the man-1' ner specified. Mv Y i. 1 I MOSES G. FARME-B.

Witnesses: 1 v

: SARAH J. Fumes, STELLA E. Rowe.

